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Data source: VAERS (Vaccine Adverse Event Reporting System)

Data through 2026 · Updated quarterly

Built by TheDataProject.ai · © 2026 VaccineWatch

Important: VAERS accepts reports of adverse events following vaccination. For any given report, there is no certainty that the reported event was caused by the vaccine. Reports may contain information that is incomplete, inaccurate, coincidental, or unverifiable. Most reports to VAERS are voluntary, which means they are subject to biases. This data cannot be used to determine if vaccines cause or contribute to adverse events.

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Important: VAERS reports alone cannot determine if a vaccine caused an adverse event. Reports may contain incomplete, inaccurate, or unverified information. Correlation does not equal causation.

  1. Home
  2. Vaccines
  3. HPV (Gardasil)
  4. Tonic clonic movements
HPV (Gardasil)×Tonic clonic movements

Tonic clonic movements Reports for HPV (Gardasil)

#171 most reported symptom for this vaccine

168
Reports
0
Deaths
20
Hospitalizations
0
Mortality Rate
%
11.9
Hosp. Rate
%

Tonic clonic movements and HPV (Gardasil)

Tonic clonic movements has been reported 168 times in association with HPV (Gardasil) vaccination in VAERS. This represents 0.4% of all 44,434 reports for this vaccine.

Among these reports, 0 mentioned death (0.00%) and 20 involved hospitalization (11.9%).

Tonic clonic movements is the #171 most frequently reported symptom for HPV (Gardasil) out of 2579 total symptoms.

Disclaimer: VAERS reports describe events that occurred after vaccination but do not establish that the vaccine caused the event. Many reported symptoms may be coincidental or related to underlying conditions.

What This Means

Seeing 168 reports of Tonic clonic movements after HPV (Gardasil) vaccination may seem alarming, but context is critical.

The mortality rate among these reports is very low at 0.00%, suggesting most cases are non-fatal.

Important Context

•Association, not causation: These reports show Tonic clonic movements occurred after vaccination, not that the vaccine caused it.
•Background rates: Tonic clonic movements may occur naturally at baseline rates in the population, unrelated to vaccination.
•Anyone can report: VAERS accepts reports from anyone — patients, parents, healthcare providers — without requiring medical verification.
•Denominator missing: VAERS counts reports, not rates per dose. Without knowing how many doses were given, raw counts can be misleading. Learn more →

Similarly Ranked Symptoms

Urine analysis normal171 reportsExpired drug administered171 reportsWhite blood cell count increased168 reportsInappropriate schedule of product administration167 reports

Quick Facts

Reports:168
Deaths:0
Hospitalizations:20
% of Vaccine:0.4%
Rank:#171 of 2579

Related Pages

HPV (Gardasil) OverviewTonic clonic movements (All Vaccines)Why Raw Numbers MisleadTop Symptoms Analysis

Data Source

This data comes from the Vaccine Adverse Event Reporting System (VAERS), jointly managed by CDC and FDA.